产品属性

品牌

厚声

所有参数

- 1 -

part

no.:

chip

resistors file

no.:

cx-01-001

instruction:

this sheet is the statement of the lead-free thick film chip resistors

specification that uniohms’ productions can meet.

rating:

type 0402

0603

0805

1206 1210 2010 2512

power rating

1/16w

(1/10ws)

1/10w

(1/8ws)

1/8w

(1/4ws)

1/4w

(1/3ws)

1/2w

(3/4ws)

max.working voltage

50v

150v

200v

max. overload voltage

100v

300v

400v

dielectric withstanding voltage

100v

300v

500v

±0.5%

±1%

±2%

Ω

--- 1m

Ω

resistance range

±5%

Ω

--- 10m

Ω

tolerance

±0.5%, ±1%, ±2%, ±5%

rated ambient temp

℃

temp

.range

-55

℃

---

+155

℃

2.1

power ra

ting:

resistors shall have a power rating based on continuous load operation at

an ambient temperature of 70

℃

. for temperature in excess of 70

℃

, the load

shall be derate as shown in figure 1

2.2

voltage ra

ting:

resistors shall have a rated direct-current (dc) continuous working

voltage or an approximate sine-wave root-mean-square (rms)

alternating-current (ac) continuous working voltage at coercial-line

frequency and waveform corresponding to the power rating, as determined

from the following formula:

rcwv =

where: rcwv = rated dc or rms ac continuous working voltage at

coercial-line

frequency

and

waveform

(volt.)

p = power rating (watt.)

nominal

resistance

(ohm)

in no case shall the rated dc or rms ac continuous working voltage be

greater than the applicable maximum value.

- 2 -

lead-free thick film chip resistors

dimension for chip:

dimension:

type l

0402

1.00

0.10 0.50

0.05 0.35

0.05 0.20

0.10 0.25

0.10

0603

1.60

0.10

+ 0.15

0.80

–

0.10

0.45

0.10 0.30

0.20 0.30

0.20

0805

2.00

0.15

+0.15

1.25

-0.10

0.55

0.10 0.40

0.20 0.40

0.20

1206

3.10

0.15

+0.15

1.55

-0.10

0.55

0.10 0.45

0.20 0.45

0.20

1210

3.10

0.10

+0.15

2.60

-0.10

0.55

0.10 0.50

0.25 0.50

0.20

2010

5.00

0.10

+0.15

2.50

-0.10

0.55

0.10 0.60

0.25 0.50

0.20

2512

6.35

0.10

+0.15

3.20

-0.10

0.55

0.10 0.60

0.25 0.50

0.20

structure:

1: high purity alumina substrate

(96% al

、

0.3±0.1%cao

、

1.0±0.3%mgo

、

2.1±0.05%sio

)

2,3: protective covering

4: resistive covering

5: termination (inner) ag/pd

6: termination (between) ni plating

7: termination (outer) sn plating

- 3 -

lead-free thick film chip resistors

marking:

(1) for 0402 size. due to the very small size of the resistor’s body

, there is

no marking on the body

example:

(2)

2%,

5% tolerance: the first two digits are significant figutres of

resistance and the third denotes number of zeros following

example:

33000

→

33k

Ω

(3)

2%,

5% tolerance: below 10

Ω

show as following, read alphabet ”r” as

decimal point.

example:

2.2

Ω

(4)

0.5%,

1% tolerance: 4 digits, first three digits are significant, forth

digit is number of zeros. letter r is decimal point.

example:

2700

→

2.7k

Ω

10.5

Ω

- 4 -

lead-free thick film chip resistors

(5) standard e-96 series values (

0.5%, ±1% tolerance) of 0603 size. due th

the small size of the resistor’s body

, 3 digits marking will be used to indicate

the accuate resistance vaue by using the following multiplier & resistance

code.

multiplier code:

code

a b c d e f g h x y z

multiplier 10

-1

-2

-3

coding formula

first

two

digits------------resistance

code

third digit-------------------multiplier

code

example

: 1.96k

Ω

=196

Ω

------29b 12.4

Ω

=124

-1

Ω

-----10x

standard e-96 values and 0603 resistance code

Ω

value

code

Ω

value

code

Ω

value

code

Ω

value

code

100

178 25 316 49 562 73

102

182 26 324 50 576 74

105

187 27 332 51 590 75

107

191 28 340 52 604 76

110

196 29 348 53 619 77

113

200 30 357 54 634 78

115

205 31 365 55 649 79

118

210 32 374 56 665 80

121

215 33 383 57 681 81

124

221 34 392 58 698 82

127

226 35 402 59 715 83

130

232 36 412 60 732 84

133

237 37 422 61 750 85

137

243 38 432 62 768 86

140

249 39 442 63 787 87

143

255 40 453 64 806 88

147

261 41 464 65 825 89

150

267 42 475 66 845 90

154

274 43 487 67 866 91

158

280 44 499 68 887 92

162

287 45 511 69 909 93

165

294 46 523 70 931 94

169

301 47 536 71 953 95

174

309 48 549 72 976 96

- 5 -

lead-free thick film chip resistors

characteristics:

characteristic limits

test method

(jis-c-5201)

0.5%

Ω

--- 10

Ω

≤

400ppm/

11---100

Ω

≤

200ppm/

101

Ω

---1m

Ω

≤

100ppm/

temperature

coefficient

Ω

--- 10

Ω

≤

400ppm/

Ω

--- 10m

Ω

≤

200ppm/

4.8 natural resistance

change per temp

. degree

centigrade

-r

(ppm/

℃

)

-t

)

: resistance value at room

temp

. (t

)

: resistance value at room

temp

. +100

℃

)

test pattern: room temp

room temp

. +100

℃

0.5%

(1%+0.1

) max.

short-time

overload

(2%+0.1

) max

4.13 permanent resistance

change after the application

of 2.5 times rcwv for 5

seconds.

insulation

resistance

1,000 m

4.6 apply 500v dc between

protective coating and

termination for 1 minute,

then measure.

dielectric

withstanding

voltage

no evidence of flashover

mechanical damage, arcing

or insulation break down.

4.7 resistors shall be

clamped in the trough of a 90

℃

metallic v-block and shall

be tested at ac potential

respectively specified in the

given list of each product

type for 60-70 seconds.

terminal bending

(1%+0.05

) max

4.33 twist of test board:

y/x = 3/90 for 60

seconds

soldering

heat

resistance change rate is:

(1%+0.05

) max

4.18 dip the resistor into a

solder bath having a

temperatuer of260

c and

hold it for 10

1 seconds.

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